What Are The Processing Forms Of Graphite Electrodes?

There are three main forms of graphite electrode processing: pressurized vibration method, CNC automatic forming method and mechanical processing method.

Pressurized vibration method: The pressurized vibration method requires a special machine tool, and the electrode master mold is opposite to the electrode shape. The graphite material and the forming tool are placed opposite to each other during processing, leaving a certain gap. The processing fluid mixed with water and abrasive is injected into it. While passing through the processing fluid, the graphite and the forming tool are ultrasonically vibrated. Under the impact of the abrasive, the graphite is slightly peeled off to form the required shape. The abrasive is SiC, B4C or diamond. The coarser the abrasive, the faster the processing speed. The machine tool adopts sealed and water curtain type for processing. It is suitable for EDM processing for mass production.

CNC automatic forming method: The CNC automatic forming method requires a special graphite electrode forming machine, which adopts CNC method, has an automatic tool changing device, and can accommodate multiple tools. To improve the processing environment, the graphite electrode is surrounded by a water curtain to prevent the graphite dust from scattering. In addition, wet processing can be used to prevent the tool from being worn and the graphite dust from flying around by using water-soluble cutting fluid. The machine tool has a high-performance filter device that can separate the cutting fluid and graphite chips, which can ensure long-term continuous processing. It is an ideal special equipment for graphite electrode processing and is suitable for electrode processing for molds. However, its price is relatively high and its application in China is not yet common.